Typewriting machine



June 24, 1.93Q. GOING 1,767,876

TYPEWRITING MACHINE Filed Feb. 21. 1928 WITNESSES INVENTOR W g MkPatented June 24, 1930 7 UNITED STA'iES PATENT OFFICE GEORGE o. GOING,or MnmLnrowN, CONNECTICUT, ASSIGNOR'TO REMINGTON TYPE- WRITER COMPANY,or rLIoN, NEW YORK, A CORPORATION on EW oax 'TYPEWRITING MACHINEApplication filed February 21, 1928. Serial No. 255,971.

My invention'relates to type actuating mechanism adapted particularly totype-- writing machines and other machines employing printing type bars.The object of the invention generallystated is to provide type-baractuating-mechanism which is substantially noiseless in operation and ismoreover readily adapted to small. typewriting machines commo'nl calledportable typewriters. A further ob ect of the invention may be said toprovide a modified construction of the type actuating mechanism whichforms the subject-matter of my prior; application Sr. No. 254,744, filedFebruary 16, 1928.. j 1

To the above and other ends which will subsequently appear, my inventionconsists in the features of construction, combinations of devices, andarran ements of parts hereinafter described an particularly pointed outin the claims.

The preferred form of the invention is shown in the accompanyingdrawing, wherein Fig. 1 is a front-to-rear fragmentary verticalsectional view taken about centrally of a typewriting machine embodyingmy invention, only so much of the machine bein shown as is necessary toa full understan ing% of said invention.

ig. 2 is a view showing a type action in operated position.

Fig. 3 is a vertical sectional view taken on a plane indicated by. thesection line 1-j-1 in Fig. 2 and looking-in the direction of the arrowsat said line.

Fig. 4 is a fragmentary view of a modification.

The type bars are pivoted in an arc ofa circle and arranged to strike onthe front upper quarter of the platen. Each type bar 1 is adapted toturn about a fixed pivotal center, the full set of type bars beingpreferably pivoted on an arcuate pivot wire 2-wire is mounted on a t pebar support or segment 3 of any suitabe construction. The type bars maybe disposed in guide slots 4, cut radially in the segment 3, the Ilatter inclining upward and rearward towards the platen 5 which isdiagrammatically illustrated and is mounted on a'suitable travelingcarriage, not shown. Each ty e bar carries a type block 6 which is preerably provided with two types 7 and 8, the former being the lowercase,and the latter the upper case type. Normally the lower case types 7 areeffective to print,but the upper case types 8 may be rendered operativeat will by relatively shifting the platen and the type bars in a knownmanner;. as for example, by a shift of the platen as indicated by dottedlines in Fig. 1. As is well known, the type bars at and near the middleof the set or system 'are' substantially straight throughout theirlengths, while as the ends of the system are approached the type barsare bent near their type ends to varying extents in order to bring themin proper relationship with the printing points on the platen.

Key actuated means are provided for op- The operating means portion ofashoe-like part 13 of an angular lever 14 having a fixed pivot 15 and anupwardl extending rearwardly inclined arm 16. verted U and looselyhouses and covers-the rear arm portion of the lever 9, the con structionproviding a yielding or lost motion connection between'the key lever 9and the sub-lever 14 and also preventing accidental derangement ordisconnection of the two parts. The upper arm 16 of the sublever ispivotally connected at 17 with the rear end of a link 18, the front endwhereof is pivotally connected at 19 with the upper arm of a secondsub-lever 20. The set of sub-levers 20 are preferably arranged inguide'slots 21 cut radially in an .arcuate rib or lug 22formedintegrally with the seg ment 3 and projecting from the rear facethereof. An arcuate pivot wire 23 is seated he shoe portion is shapedlike an in 'dotted line position 1.

in a hole extending throughout the rib and bridges the guide slots 21therein, said wire 23-providing a common pivot for the set of sub-levers20. The longer'arm of each of these sub-levers curves downward andforward and is pivotally connected at 24 with the rear end of a link 25which extendsforward and is pivotally connected at 26 with a member 27which is also pivotally connected at 28 with a downward extension 1.

from the type bar. Preferably the member 27 is slotted to receive theend portions of the parts 25 and 1 and the cross pins or rivets 26 and28 are secured in the members 27 at opposite sides of the slottedportions thereof, said pins passing loosely through the parts 25 and 1*.Normally, the set of type bars 1 extend forward and incline upward,their type ends being in contact with a rest or support 29 made of anarcuate ,strip of fibre or other suitable composition which is seatedorv housed in a stationary segmental support or rest 30. While each turnon its fulcrum 10, actuating the sublever 14, transmitting a pull to thelink 18 which will be effective to actuate the sublever 20, the lowerarm of said lever operating to thrust or push the link 25 forward,transmitting an operating movement through the member 27 to the type bar1 which will thereby be swung about its pivot 2 from a position of resttowards the platen. Preferably the key lever is arrested by anunderlying stop 31 before the type bar reaches the platen, as will beunderstood fmFi.2.hihh' th'kl m g w c S OWS 8 6y ever In is threadedinto a hole in the forward face of contact with the stop 31, the typebar at the moment of such contact being in the The lost .motionconnection between the contact face 12 and the shoe 13 permits the typebar to continue its movement to printing position after the key leverhas been arrested. After operation the parts ofthe type action arerestored to normal position by means comprising a coiled spring 32having its opposlte ends hooked through holes and the upper arms of theassociate sub levers 14 and 20, "the spring being disposed prefer ablyjustbelow the associate link 18.

In add tion to the train of actuating devlces above described, each typebar is associated with controlling means whereby it is slowed down as itapproaches the. platen and is caused to coact with the platen with aminimum of noise and to be pressed a ainst the platen with suflicientforce to e ect a proper imprint of the type. The controlling its typeend and provides a pivotal connec-.

tion between the type bar and the two-part link 33. The opposite ends ofthe arms 33 curve downward and loosely embrace the sides of the rear endportion of the associate link 34 which is made in a single piece. Thedownwardly curving ends are fixedly connected by a cross pin or rivet 36which passes loosely through a hole in. the link 34 and provides apivotal connection between the llIlkS 33 and 34. Normally as seen-inFig. 1, the two links are! closely folded, the link 34 extending forwardand upward under the link 33 and the type bar, and having a fixed pivotor anchorage 37 at its forward end. The said forward end is preferablyreceived in a kerf or guide slot formed in a hanger 38, the pivot pin 37bridging the slot in said hanger. The set of hangers 38 are adjust-4ably supported in slots 39 cut radially in the a segment 40. Theconstruction is such that 3.'Cl0SG 'COI1Il8Ct-l0ll 41, 42 is establishedbetween the hanger 38 and the adjusting screw 43, 44 so that when thescrew is threaded in or out the hanger is slid or adjusted in itsslot-way to a corresponding extent. In order .to hold the hanger 38 inadjusted position, clamping plates or washers 45 arearranged over thetops of the hangers, bridging the slots 39, said plates being secured inplace by screws 46. If preferred a single arcuate plate secured by asuflicient number of screws may be employed for the whole set ofhangers.

In addition to the toggle 33, '34 the controlling means comprises asecond toggle, one link of which is constituted by the member 27, theother link 47 being composed of two parallel arms or parts 47* whichloosely vides a pivotal connection betweeuthe' two parts or links 27 and47, while the pin 49,

likewise passes loosely through a hole in the link 34 and serves as apivotal connection between said link 34 and the link 47 In order toprevent overthrow of the linkages a spring .by the Wei "27 will be toslow down the type bar and cause it to contact operatively with the stopis preferably provided, constituted by a shouldered rivet 50 which is,secured to the free ends of spring arms 51 preferably formed integrallywith the parts or arms 47 and so isposed that the stop 50' will coactwith an edge or face of the member 27 when the parts are in operatedposition as shown in Fig. 2.

Upon depression of one of the keys the train of actuating devices willoperate as has been described, causin the connected type bar to swing onits plvot 2 from the Fig. 1 position so that at the moment of arrest ofthe key lever 9 the type bar will be close'to the platen in the dottedline position indicated at 1. During this operation of the type bar byits actuating devices, the controlling means comprising the two pairs oftoggles 33, 34 and 27, 47 will be gradually opened or straightened asthe result of their connection with the type bar and with the link 25.The energy acquired ghted member 27 and other parts in the train 'ofcontrolling mechanism as well as the momentumof the type bar itself, inmoving from the normal to the 1 position, will be suflicient to completethe movement of the type bar to the printing position subsequent to thearrest of the key lever. The effect of the straightening of the toggle33, 34 in moving to this position combined with the action of the othertoggle 47 platen with a minimum of noise. However, the momentum ofthe'member 27 and connected parts will be effective to communi catesufficient pressure to the operating type to cause it to print fully andclearly. It will be seen that in the printing-position the pivotalpoints 35, 36 and 37 will be nearly or substantially in line but thatoverthrow will be prevented by the members 47, 27 whose pivotal points49, 48 and 28 will be prevented from aligning exactly by the coaction ofthe stop device 50 with the contiguousface of the part 27. After theprinting operation, the parts will be restored to normal positionassisted by their own reaction, the effect of the restoring spring andthe force of gravity.

It will be understood that the printingwill be effected through theusual inking ribbon which will be controlled by any desired mechanismthat may be found suitable for the purpose, although the ribbon and itsmechanism are omitted from the drawing.

Changes may be effected without departing from the scope of myinvention, and an example of such changes is shown in the modificationillustrated in Fig. 4. In this modified construction the type bar itselfand the train of key operated actuating devices, as well as the two setsof toggles whichare vend portions of the links 33 and 34 have a slightlydifferent shape in order better to accommodate associate'parts. However,the

Fig. 4 construction differs from the Figs.

1-3 construction in that the link 47 instead of being connected to thelink 34 as at 49, is reset or adjusted about its pivot 48, beingdisconnected from the link 34 and pivotally connected instead at thepoint 52 to the link 33 just to the rear of its pivotal connection 36with the link 34. T e effect of this change is to give a moredirect-effect of the member 27 and associate parts on the toggle 33, 34.

It will be observed that by the-present invention the drive link oractuating link 25 is connected to the weighted tog le member 27 and notdirectly to the type Ear; that said link derives motion directly from anangular lever having a fixed fulcrum, preferably on the type-bar segmentitself, said lever in turn being linked to a second lever which isactuated by the key lever itself logs;

through a rolling contact,'the construction affording a slow'start andincreasing speed until the type bar approaches close to the platen, fromwhich point the double-toggle controlling-mechanism is effective to slowdown the type bar and cause it. to meet quietly with the platen but withan effective printing pressure; also, that the weighted toggle member27is pivoted directly to the type bar, and its associate link 47 isconnected to the main toggle, in one instance (Figs. 1-3) to the lowerlink thereof, and in the other instance (Fig. 4) to the upper linkthereof; that the stop for preventlng overthrow is spring-mounted on thesecond link of the weighted toggle; that the return spring isv directlconnected toboth of the sub-levers; and t at the main toggle is connected directly tothe type bar and to a fixed pivot or anchorage whichis adjustable so as I,

to control the contactive engagement of the printing types with theplaten. f

Besides the changes heretofore described in connection with Fig. 4 otherchanges 80 L comprised in the controlling means, are of may be madewithout departing from the spirit and scope of my invention.

\Vhat I claim as new and desire to secure Letters Patent, is:

1. The combination of a platen; a pivoted type bar; controlling-meanstherefor comprising two pairs of toggles, one member of one pair beingpivoted to the type bar near the type head and the second member of thesame pair having a stationary anchorage, one member of the second pairof toggles being pivoted directly to the said second member of the firstpair, and the second member of the second pair being pivoted to the typebar near its pivot; and key actuated means for operating the type barcomprising a drive link pivoted directly to the second member of thesecond pair of toggles.

2. The combination of a platen; a pivoted type bar; controlling-meanstherefor 'comprising two pairs of toggles, one member of one pair beingpivoted to the type bar near the type head, and the second member of thesame pair having stationary anchorage, one member of the second pair oftoggles being pivoted directly to the said second member of the firstpair, and the second member of the second pair being pivoted to the typebar near its pivot; and key actuated means for operating the type barcomprising a drive link pivoted directly to the second member of thesecond pair of toggles, a key lever, a stop to limit the downward strokeof the key lever, and lost motion connection between said key lever andsaid drive link.

3. The combination of a platen, a pivoted type bar; controlling meanstherefor combeing pivoted the same pair prising two pairs of toggles,one member of one pair being pivoted to the type bar near the type headand the second member of the same pair having stationary anchorage, onemember of the second pair of toggles being pivoted directly to the saidsecond member of the first pair, and the second member of the secondpair being pivoted to the type bar near its pivot; and key actuatedmeans for operating the type bar comprising a drive link ivoted directlyto the second member of the second pair of toggles, a sublever connectedto said link, a second sublever, a link between said sub-levers, and akey lever operative on I 4. The combination of aplaten; a pivoted typebar; controlling means therefor two pairs of toggles, one member ofprising one pair the type being pivoted to the type bar near head, andthe secondmember of having stationary anchorage, one member of thesecond painof toggles directly to the said second member of the firstpair, and the second member of the second pair being pivoted to the typebar near its pivot; and key actuated means for op'erating the type barcomprissaid second sub-lever.

ing a drive link pivoted directly to the second member of the secondpair of toggles, a sub-lever connected to said link, a second sub-lever,a link between said sub-levers, a key lever, a stop to limit the keylever stroke, and a lost'motion connection between said key lever andsaid second sub-lever.

5. The combination of a platen, a pivoted type bar, controlling-meansfor said type bar comprising two pairs of toggles, one member of onepair being pivoted tov the type bar near the type head and the secondmember of the same pair having stationary anchorage, one member of thesecond pail of toggles being pivoted directly to the said secondmember'of the first pair, and the second member of the second pair beingpivoted type bar; controlling-means therefor comprising two pairs oftoggles, one member of each pair being pivoted directly to the type bar;and key actuated means for operating the type bar comprising a drivelink pivotally connected to a member of one of the toggles.

7. The combination of platen; a pivotedtype bar; controlling-meanstherefor comprising two pairs of toggles, one member of each pair beingpivoted directly to the type bar; and key actuated means for operatingthe type bar comprising a drive link pivotally connected to a member ofone of the toggles, a sub-lever having one arm connected to the drivelink, asecond link connected to the other arm of said sub-lever,

a second sub-lever connected at one arm to said secondlink, and a keyleveroperative directly on the othen'arm of said second sub-lever.

8. The combination of a platen; a pivoted type ba'r; controllin -meanstherefor comprising two pairs 0 .toggles, one member of each pair beingpivoted directly to the ,type bar; and key actuated means for op-;eratmg the type bar comprising a drive link pivotally connected to amember of one of the toggles, a sub-lever having one arm connected tothe drive link, a second link connected to the other arm of saidsub-lever, a second sub-lever connected to said second link, a key leveroperative directly on said second sub-lever, and a draw spring directlyconnected with both of said sub-levers.

9. The combination of a platen; a pivoted type bar; and controlling thetype bar to effect subkey actuated means for operating 5 member of eachpair being pivoted directly v erating and controlling the type bar toeffect substantially a noiseless pressure im-- print, said meanscomprising two stantially a noiseless pressure imprint, said meanscomprising two pairs of toggles, one

to the type bar, one of said pairs having a fixed anchorage, a fingerkey, and driving connections therefrom to'one of said to for actuatingthe typebar from said ey through said toggles; and devices for variablysetting sa'id anchorage.

10. The combination of 'a platen; a pivoted type bar; key actuatedmeansfor opairs of toggles, one member of each pairbeing pivoteddirectly to the type bar one near the type head thereof, the othermember of the same pair that is connected near'the type head having astationary anchorage, a finger key, and driving connections therefrom to.one of said toggles for actuating the type barfrom said he through saidtoggles; and devices for a ording variable settings of said anchorage.

11, The combination of a platen; a pivoted type 'bar; key actuated meansfor operating and controlling the type bar to effect substantially anoiseless pressure imprint, said means comprising two pairsoftoggles,.one member of one pair being pivoted directly to the type barnear the type head and the second member of the same pair having 'astationary anchorage which is adjustable to vary the effect of thetoggle on the type bar, one member of the other pair of toggles beingpivoted directly to the type barnear its pivot, afinger key, and drivingconnections therefrom to one of said toggles for actuating the type barfrom thekey through said toggles.

12. The combination of a platen; a pivoted type bar; key actuated meansfor operating and controlling the type bar to effect substantially anoiseless pressure imprint, said means comprising two pairs of toggles,one member of one' pair being pivoted directly to the type bar near thetype head and the second member of the same air having a stationaryanchorage which ls'adjustable to vary the effect of the toggle on thetype bar, one member of the other pair of toggles being pivoted directlyto the type bar near its plvot, stop devices comprising a s ring stop onone of the toggle members e ective to prevent overthrow of both pairs oftoggles, a finger key, and driving connections therefrom to one of saidtoggles for actuating the type bar from said key through said toggles.

13.vThe combination of a platen; a pivoted type bar; key actuated meansfor oples oted directly to the type bar and its com- .with the secondelement of the said. second pair to limit movement of both pairs oftoggles, a key lever, an actuating device controlled thereby and withwhich said key lever has a loose connection that toggles and type bar tomove in ependently of the key lever after the latter has been arrested,and a link connected directly to said actuating device and a member ofone of said toggles.

ermits the 14. The combination of a platen; a pivotedtype bar; keyactuated means for operating and controlling the type bar' to effectsubstantially a noiseless pressure imprint, said means comprising twopairs of toggles, one member of one pair being pivoted directly to thetype bar near the type head and the second member of the same.

nected directly to said actuating device and a member of one of saidtoggles.

Signed at Middletown, in the county of Middlesex and State ofConnecticut, this 17th day of February, A. D. 1928.

GEORGE G. GOING.

